21980042

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{68261}}^1$

素因数の和:68293

約数の個数: 16

約数和(自身を含む): 39318912

約数和(自身を除く): 17338870

約数列:

[1, 2, 7, 14, 23, 46, 161, 322, 68261, 136522, 477827, 955654, 1570003, 3140006, 10990021, 21980042]

約数ペア:

[(1, 21980042), (2, 10990021), (7, 3140006), (14, 1570003), (23, 955654), (46, 477827), (161, 136522), (322, 68261)]